标人教实验版高三module9u(2)

《标人教实验版高三module9u(2)》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、课标人教实验版高三Module9Unit2Reading广东曾桂萍刘玉Discuss1.Howdoyouthinkseamenfoundtheirwaybeforemodernaccuratemethodsofnavigationwereinvented?Keptclosetotheshore,usednaturesuchasthesun,wind,birds,tide,etc,tohelpthem,andusedsomeoftheinstrumentsincludingacompass,astrolabe,etc.2.Whichdoyouthi

2、nkwaseasiertoworkout:latitudeorlongitude?Latitude,becauseitwasusedtomeasurehowfaryouhadtraveledfromlandonastraightline.Itwasdiscoveredalongtimebeforelongitude.3.Canyouidentifytheseearlynavigationalinstrumentsseamenusedandexplainhowtheyareused?1)compass(inancientChina)2)astrol

3、abe3)sextant4)sea/nautical/marinechart4.Whichonesdoyouthinkarestillusedtoday?Seachartsarestillusedtoday.Comprehending1.Readthepassageandanswerthefollowingquestions.Whatistheuseofabearingcircle,astrolabe,quadrantorsextant?()Whatistheuseofacompass?()A.TosetthecourseoftheshipB.T

4、omeasurethepositionoftheshipC.TomeasurethespeedoftheshipD.TotellthetimeAB2)Whyarespeedandtimeimportantinworkingoutthelongitudeofaship?Speedandtimeareimportantinfindingoutthelongitudeofashipbecausetheearthmovesfifteendegreeswestwardseveryhour.Ifyouknowyourdirection,speedandtim

5、e,youcanworkouttheapproximatelongitudeorchangeinyourpositioninrelationtothestars.3)Whyisthepositionofthesunandvariousstarsusefulforworkingoutlatitude?Thepositionofthesunandstarsareusefulforworkingoutlatitudebecausetheyarefixedpointsintheskyandtheirmovementsinrelationtotheeart

6、harealreadyknown.Sotheycanbeusedtomeasureaship'sposition.2.SupposeyouwereaseacaptainaimingtosailroundAfrica.Discussingroups:1)Whatskillswouldyouseekinyoursailors?2)Whatproblemswouldyouanticipateforthisjourney?3.Readthepassageagainandusetheinformationtoanalysethenavigationalsk

7、ills.Usingnature1.Tofindtheship’spositionatseaasailorusedtheNorthStarandthesun.2.Asailorknewthatlandwasnearbyifhesaw________________________________________________________.3.Sailorsused________________________________toincreasetheirspeed.freshseaweed,nestingbirdsreturninghom

8、eintheeveningorfogseacurrentsortidesandwinds4.Thereweretwomethodstof